ITC 1 & 2 Circuit Heat Trace Controller Line or Ambient Sensing

Installation & Operation Manual ITC 1 & 2 Circuit Heat Trace Controller Line or Ambient Sensing Ordinary Areas & Class I, Division 2 1 PK509-10 0037-75516 June 2018

Table of Contents Section Page Table of Contents... 2 Safety Precautions... 3 Introduction... 4 Model Overview... 5 Theory of Operation... 6 Before Powering Up... 6 Installation... 7 Operating the ITC... 8 HMI (Human Machine Interface)... 8 Main Window... 8 Navigating the ITC... 9 The Keypad... 10 Programming the ITC... 11 Security Levels... 11 The Temperature Menu... 12 The Current Menu... 12 The Control Menu... 12 The Soft Start Function... 14 The Comms Menu (Communications)... 14 The System Menu... 15 Current Sampling... 19 Alarms... 19 Dimensions... 20 Default Settings... 21 Specifications... 23 Equipment Ratings... 25 Field Wiring Considerations... 25 Modbus Wiring Considerations... 25 Customer Wiring... 26 Modbus Serial Communications... 28 Service Contact Information... 32 2

Safety Precautions Throughout the intellitrace TM Setup Guide, these symbols will alert you to potential hazards. Safety precautions should always be followed to reduce the risk of fire, electrical shock, injury and even death to persons. Please read all instructions before operating your intellitrace TM ITC1 or ITC2 Heat Trace Controller. To avoid electrical shock or injury, always remove power before servicing a circuit. Personnel working with or near high voltages should be familiar with modern methods of resuscitation. Contact an area supervisor, registered electrician or safety personnel for more information. Before working inside the equipment, turn power off and ground all points of high potential before touching them. Users should install adequate controls and safety devices with their electric heating equipment. Where the consequences of failure may be severe, back-up controls are essential. Although the safety of the installation is responsibility of the user, Chromalox will be glad to assist in making equipment recommendations. A disconnect device and circuit breaker should be provided in the end installation. The installation and proximity for the disconnect device must satisfy the electrical Authority having jurisdiction for the installation, such as NEC. Branch circuit protection should be set for 40 amps or lower. HIGH VOLTAGE is used in the operation of this equipment; DEATH ON CONTACT may result if personnel fail to observe safety precautions. Learn the areas containing high-voltage connections when installing or operating this equipment. Be careful not to contact high-voltage connections when installing or operating this equipment. ELECTRIC SHOCK HAZARD. Any installation involving control equipment must be performed by a qualified person and must be effectively grounded in accordance with the National Electrical Code to eliminate shock hazard. Should the equipment be used in a manner not specified by Chromalox, the protection provided may be impaired. 3

Introduction For nearly a century, customers have relied upon Chromalox for premiere quality and innovative solutions for industrial heating applications. Chromalox manufactures the world s largest and broadest line of electric heat and control products. The intellitrace TM family of heat tracing products continues to expand with its latest single or two circuit controllers the ITC1 & ITC2. These are a complete temperature control and system management solutions for electrical heat trace applications. They are designed for industrial applications in ordinary or Class I, Division 2. Groups A,B,C & D hazardous locations. The intellitrace TM ITC1 & ITC2 provides the user with an easy to navigate menu system, continuous critical parameter monitoring, application flexibility and equipment safety precautions. The ITC is an ideal solution either Freeze Protection or Process Temperature control. Whether you have Ambient or Line Sensing or a combination of both, the ITC is the affordable and complete system for you. intellitrace TM ITC Features: 1 & 2 Circuit Models 100 277 VAC, 50/60 Hz SSR Control, 40 Amps per Circuit PID, On/Off or Manual Control Modes Selectable Soft Start Feature ModBus Communications RTU/RS485 (& 422) TCP/Ethernet Full Monitoring & Alarms High / Low Temperature High & Low Current GFEP & Sensor Failure Programmable Duty Cycle On Sensor Failure Alarm Indication & Announcement Password Protected Security Levels NEMA 4X Fiberglass or 316 SS Wall Mount Enclosure LED Indication for Power, Load & Alarm per Circuit Front Panel Capacitive Touch Switches One or two Sensor Inputs / Circuit Min, Max & Averaging 2 Circuit Ambient control from a single RTD sensor High Resolution TFT Display: 2 Circuits displayed / screen (on 2 Circuit unit) Displayed Parameters: Process Variable, Set Point Temperature, Control Mode, Soft Start status, Load demand, Alarm Status Agency Approvals: UL, cul Ordinary Areas, Class I Division 2 areas CE Options: Ethernet Communications (TCP/Ethernet or web server/ethernet) Wireless Communications (Consult Sales) 12 x 10 x 8 NEMA 4X 316SS Wall Mount Enclosure IMPORTANT: To comply with NEC code, one of the following must apply. 1. Customer supplied 2 pole GFEP breaker in branch circuit breaker box upstream of the controller 2. Requirement shall not apply in industrial establishments where there is alarm indication of ground faults and the following conditions apply: a. conditions of maintenance and supervison ensure that the qualified person(s) service the installed heater. b. continued circuit operation is necessary for safe operation of equipment or process. 4

Model Overview The ITC series IntelliTRACE Controller is designed for industrial Heat Trace Line and/or Ambient Sensing applications in Hazardous (Class I, Division 2) or Non-Hazardous areas. The ITC series controller will control 1 or 2 circuits and is a wall mounted device that operates at 100 to 277 VAC and offers the following standard design features: NEMA 4X FG enclosure, 3.5 High Resolution TFT Display with integral display heater, front panel capacitive touch switches & LED Indication of Power, Load & Alarm. It also offers PID, ON/OFF or Manual SSR power control, is rated at 40A per circuit in a -40 F to 104 F Ambient, employs a Soft Start program and accepts up to 2 RTD sensors per circuit to provide Ambient and/or Line Sensing type control. When 2 sensors are employed, the minimum, maximum or average of the two sensor temperatures may be used to control each circuit. The ITC2 may also be used as a 2-channel ambient sensing controller that uses only one RTD to control both circuits. Other standard features include: Alarms (1xAC & 1xDC) for High & Low Current, GFEP (Ground Fault Equipment Protection), High & Low Temperature & Sensor Failure, ModBus RTU/RS485 & /RS422 Communications. Alarms may be set up to be normally open or normally closed. Options Include: TCP/Ethernet Communications, Wireless Temperature Sensing and 316 Stainless Steel Enclosure Please see Table 1 below for applicable features & capabilities by Model type. Table 1 Features / Capabilities ITC1 ITC2 40 Amps/ Loop @ 100 to 277 Volts X X Number of Circuits 1 2 SSR (Solid State Relay) Control X X 3.5 320x240 RGB Full color graphic TFT module X X 10 x 8 x 6 NEMA 4X FG Enclosure X X Soft Start Feature X X PID, ON/OFF or Manual Control X X RTU/RS485 & /RS422 ModBus Communications X X Up to Two RTD Sensors per Circuit X X Temperature Monitoring and Alarms X X GFEP Monitoring and Alarms X X Current Load Monitoring and Alarms X X Sensor Failure Monitoring and Alarms X X Three Levels of Security X X Optional 12 x 10 x 8 (30 x 25 x 20mm) 316 SS Enclosure X X Optional TCP/Ethernet Communication X X 5

Theory of Operation The detailed set up of the individual circuit parameters is explained throughout the various sections of this manual. This Theory of Operation overview is intended to give a quick summary of how it all works together. Parameter setpoints (High/Low Temperature, High/ Low Current & GFEP), Control Modes (Auto or Manual) and operation modes under alarm conditions (GFEP limit violation & Sensor Loss) are entered for each circuit. Each circuit is designed to operate independently. Active loops are individually tested for 2 seconds every 2 minutes. During the test, a current load value is updated on the yellow bar located on the Main Window and a new GFEP current is automatically and continuously calculated. If the Ground Fault (GFEP) limit is surpassed, the ITC has four options of behavior: 1. Alarm, non-latching No change in output. 2. Alarm and Trip, non-latching Ouput goes to 0% (off) while in alarm state. Note (1&2): Alarm will be cleared when sensed GFEP is 5mA less than GFEP setpoint. 3. Alarm, latching No change in output. 4. Alarm & trip, latching Output goes to 0% (off) while in alarm state. Note (3&4): Alarm condition may only be cleared with a manual reset of the alarm Similarly, should a failed sensor condition appear, the ITC will go into alarm state and display a flashing sensor error. The ITC will automatically be switched into Manual mode. The output % may be adjusted by the user within the SYSTEM MENU Parameter: Failed Sensor Output 1 (or 2). See Temperature Sensing & Failed Sensor Output parameters in the System Menu definitions below. To limit inrush current on the overall system, a proprietary Soft Start algorithm is applied during system start-up. This will ONLY occur while the operation mode is set to AUTO. The Soft Start program will increment the output by 1% every 1 second until the desired temperature is reached or the output % achieves 100%. After the Soft Start program completes its cycle, the Auto Control Mode of the system will return to either PID or ON/OFF Control Mode, depending what was selected by the user. The Soft Start Program will not function if the control mode is set to Manual. Before Powering Up Chromalox takes great pride in knowing that we have provided to you a product of premium quality and workmanship. We have taken every precaution to ensure that your equipment arrives safe and secure. However, vibration and temperature changes during shipping can cause some components to become loose. Additionally, throughout the life span of this product, other environmental and application conditions may have affected the mechanical and electrical continuity of several internal components. Therefore, for your safety and overall product performance, please take the time to familiarize yourself with the MAINTENANCE, OPERATION, AND INSTALLATION INSTRUCTIONS technical manual that was shipped with your control product. Wiring and Connections Check wiring and connections as follows: a. Inspect wiring for wear, fraying, chipping, nicks, and evidence of overheating. Repair minor defects with a good grade of electrical tape, or replace if needed. b. Inspect for loose electrical and mechanical connections. Tighten or replace defective crimp-style lugs. Re-solder loose solder connections. Tighten or replace all loose or missing hardware. These precautions must be adhered to when the product is received as well as before every season or on an annual basis, whichever is shortest. Since it is not uncommon for electrical wiring and mechanical connections to become slightly loosened during shipment, we ask that you pay particular attention to section 4-5.3: 6

Installation The ITC employs a SSR (Solid State Relay) as a means to switch the heating load power. Inherently, SSR s produce heat when operating. Heat is dissipated at the rear of the ITC through a heat sink. By design, the ITC must be mounted in a vertical orientation in order to allow the heat sink to properly dissipate the heat from the controller. See Figure 1. The ITC is shipped with one set of stainless steel mounting brackets. These brackets were specifically designed to allow sufficient airflow in and around the heat sink. The air flow above or below this heat sink must in no way become restricted. See Figure 1. To maintain UL compliance, the heat sink must be inspected every season to confirm that no debris or objects are in contact with the heat sink. All debris must be removed from the heat sink fins. High pressure blasts of clean, dry air or other means which will not damage the fins are to be used to dislodge all debris from the fins. Should the owner decide not to use the provided brackets, mounting of the ITC must incorporate all of the following dimensional safeguards (Refer to Figure 2): 1. Maintain a minimum of 1.5 (3.8 cm) of free air space on either side of the heat sink (K) 2. Maintain a minimum of 1.8 (4.6 cm) of free air space directly behind the heat sink (C) 3. Zero air flow restriction above and below the heat sink. 4. The mounting surface, customer mounting bracket and fasteners must be of suitable structural design to support four times the weight of the equipment. Violating any of the heat sink clearance dimensions or if the equipment is used or mounted in a manner not specified by Chromalox, the protection provided may be impaired. This could result in equipment damage, personal injury or both. K K C Heat Sink Mounting Brackets C Front Heat Sink Mounting Surface Front Top View of ITC Controller Right Side View of ITC Controller Figure 1 Mounting Surface Considerations The preferred materials of the mounting surface include metals, concrete or wood products. If the ITC is to be mounted outdoors, then the metals shall have corrosion resistant properties and the wood products shall be treated for outdoor use. If the mounting surface is plaster (drywall), it shall be of the following minimum construction: 1/2, +/-1/16 (10 mm, +/-2mm) in thickness and supported by nominal 2 x 4 (50mm x 100mm, +/-10 mm) studs that are on 16, +/- 1/2 (400mm, +/- 10mm) centers. See Dimensions section for wall mount layout and hole location. Mounting shall be performed by experienced professionals. Fasteners Figure 2 The fasteners shall be of 300 series (304 or 316) stainless steel and they shall be a #8 or #10 (or metric equivalent) bolt or screw configuration. If anchors are to be used, ensure that they match the fastener specification. Improper mounting may cause an unsafe condition resulting in equipment damage or failure which could cause personal injury. 7

Operating the ITC HMI (Human Machine Interface) There are three areas on the front panel of the ITC in which the User may visually receive information or provide input to the controller: 1. LED status indication for Power, Load & Alarm for each circuit 2. Hi Resolution TFT displays the parameter settings, alarm type, mode of operation, current load demand, program menu screen and menu selection items 3. Capacitive touch keypad Main Window In normal operating mode, the main window screen on the ITC displays the circuit number, set point temperature, process temperature, current load demand, soft start status, mode of operation, output % and alarm type for each active circuit. Below is the Main Window for a 2 Circuit ITC. Circuit Number Set Point Temperature Process Temperature Ambient Temperature Current Load, Bar Graph & Value Mode of Operation & Output % per Circuit Soft Start Status Auto Mode Type (PID or On/Off) 8

Navigating the ITC Visually, here is how one navigates through the ITC Menus & Parameters: Security Level 3 Security Level 2 Security Level 1 1. Main Window Mode No Logged? Yes No Yes Correct? 2. Login 3. Temperature Menu Mode 4. Current Menu Mode 5. Control Menu Mode 6. Comms Menu Mode 7. System Menu Mode Temp Setpoint 1 Lo Current Alarm 1 Auto Control Mode 1 Auto Control Mode 2 Baud Rate Firmware Version Lo Temp Alarm 1 Hi Current Alarm1 Auto/Man/Off 1 Auto/Man/Off 2 Parity Button Sound Hi Temp Alarm 1 GFEP Setpoint 1 Deadband 1 Deadband 2 Modbus ID Units Temp Setpoint 2 GFEP Alarm/Trip 1 Autotune 1 Autotune 2 IP Address Temp. Sensing 1 Lo Temp Alarm 2 Lo Current Alarm 2 Prop. Band 1 Prop. Band 2 DHCP Temp. Sensing 2 Hi Temp Alarm 2 Hi Current Alarm 2 Integral 1 Integral 2 Failed Sensor Output 1 GFEP Setpoint 2 Rate 1 Rate 2 Failed Sensor Output 2 GFEP Alarm/Trip 2 Soft Start 1 Soft Start 2 Password Level 1 Manual Offset 1 Manual Offset 2 Password Level 2 GFEP Alarm/Trip 2 Mode Curved Double Arrow - continuation path for 1-Circuit Units Only Dashed Parameter Ovals appear on 2-Circuit Units Only Dashed, Angled Connector - continuation path for 2-Circuit Units Only Mode arrow represents pressing the MODE Key Password Level 3 Alarm State Restore to Default The horizontal security level bars, which are above the ITC Menu & Parameter navigation map, illustrate the available menus within that security level. The Main Window is presented when the button is selected while the operator is at the last available menu screen within the current security level. 9

The Keypad There are five capacitive touch keys or buttons on the front panel. The keypad allows the user to select or change parameters & settings, clear alarms and navigate throughout the ITC programming areas. See Figure 3 shown below: MODE UP DOWN ENTER RESET Figure 3 The function of each key is as follows: KEY MODE UP DOWN ENTER FUNCTION Allows the user to Navigate between Menus & Main Window 1. Within a Menu, Scroll UP to next Parameter or Setting within that Menu 2. When viewing an adjustable parameter or setting, increments that parameter UP to the next available value. For a quick scroll, push and hold the key. 1. Within a Menu, Scroll DOWN to next Parameter or Setting within that Menu 2. When viewing an adjustable parameter or setting, increments that parameter DOWN to the next available value. For a quick scroll, push and hold the key. 1. To accept a parameter or setting that has been entered or changed. 2. Press to accept the change when viewing an adjustable parameter or setting. 3. When in LOGIN Screen, press to advance to next security digit. RESET Resets or clears all alarms Programming the ITC The ITC is pre-programmed with default parameters and settings that allow it to function right out of the box. To change any of the parameters or settings on the ITC, you must access the appropriate menu(s): Temperature Menu, Current Menu, Control Menu, Comms (communications) Menu or System Menu. To access any of these menus, press the button on the keypad. You will be presented with the Login screen: Press ENTER to advance to the next digit. 10

Security Levels You must first enter a passcode that is aligned with the menu that you wish to access. In most cases, limited access to certain programming areas is desired. The most frequently used parameter settings have the lowest level of security. Invalid passcodes will not be accepted and you will be returned to the LOGIN Screen. Initial factory set passcodes for the Security levels below are: You will be returned to the main screen if no buttons are depressed within a 30 second time frame. Passcodes may be reprogrammed within the Systems Menu. These codes should be kept in a secure place. Security Level Passcode Available Programming Menus 1 0011 Temperature Menu Only 2 0034 Temperature & Current Menus Only 3 0063 Temperature, Current, Control, Comms & System Menus The Temperature Menu Security Levels 1, 2 & 3 3. Temperature Menu Temperature Setpoint Low Temperature Alarm High Temperature Alarm Process Temperature Variable Lower limit of the Process Temperature Variable at which the system goes into alarm state. This alarm may be turned OFF by going one increment beyond the Lowest setting. Upper limit of the Process Temperature Variable at which the system goes into alarm state. This alarm may be turned OFF by going one increment beyond the Highest setting. The Temperature Menu provides access to the Temperature based parameters: Temperature Setpoint, Low Temperature Alarm & High Temperature Alarm for Circuits 1 and 2 (when available). 11

The Current Menu Security Levels 2 & 3 4. Current Menu Low Current Alarm Lower limit of the Load Current Variable at which the system goes into alarm state. This alarm may be turned OFF by going one increment beyond the Lowest setting. High Current Alarm Upper limit of the Load Current Variable at which the system goes into alarm state. This alarm may be turned OFF by going one increment beyond the Highest setting. GFEP Setpoint Upper limit of the Ground Fault Equipment Protection Variable at which the system goes into alarm state GFEP Alarm/Trip Action taken by controller when the GFEP Setpoint alarm condition is achieved. The options are: Output remains at selected output %. 1. Alarm Only, Alarm clears when Non-Latching sensed GFEP current is 5mA < GFEP setpoint Output goes to 0% (off) while in alarm 2. Alarm & Trip, state. Alarm clears Non-Latching when sensed GFEP current is 5mA <GFEP setpoint The Current Menu provides access to the current and GFEP based parameters: Low Current Alarm, High Current Alarm, GFEP Setpoint & GFEP Alarm/Trip for Circuits 1 and 2 (when available). The Control Menu Security Level 3 12 3. Alarm Only, Latching Output remains at selected output %. Alarm condition may only be cleared with a manual reset. 4. Alarm & Trip, Latching Output goes to 0% (Off) while in alarm state. Alarm condition may only be cleared with a manual reset.

The Control Menu provides access to the types of Automatic Control, Mode of Operation, the parameters which influence the control algorithms and the Soft Start function: Auto Control Mode, Auto/Manual/Off Control, Deadband, Autotune, Proportional Band, Integral, Rate (Derivative), Soft Start function and Manual Offset. 5. Control Menu Auto Control Mode Auto/Manual/Off (Mode of Operation) Autotune Deadband Proportional Band, P Integral, I (Automatic Reset) Derivative, D (Rate) Soft Start Manual Offset When the ITC is in AUTO Mode (see AUTO/MANUAL/Off parameter), the choice of Automatic Control is either PID or ON/OFF Mode. Determines the type of Control Operation: Automatic, Manual or Off. Automatic Control: Select Auto. This allows PID or On/Off control. Manual Control: Select 1 100. This is the % power output. Off: Select 0. This equates to 0% output, which turns off that circuit. NOTE: The Soft Start function will only engage when the ITC is in AUTO Mode The ITC Autotune function establishes the individual P, I & D (Proportional Band, Integral & Derivative) control modes. These modes help to bring the process variable to the setpoint temperature as quickly as possible. In order to properly calculate the P, I & D modes, the Autotune program requires a 25 degree rise in sensed temperature after initiating the program. If within 30 minutes the temperature will not reach its setpoint, the Autotune algorithm will be canceled and old PID values will be used. Once the Autotune feature is activated, you must not change the menu page until the Autotune algorithm is completed. Changing the page will cause the Autotune algorithm to shut down. The Autotune function is a one-time algorithm set up of the P, I & D control modes. Should your process variables change significantly, it is suggested to that the Autotune feature be turned off and then reinitiated. Active ONLY when the ITC is in Auto Mode & under On/Off Control The temperature range equally divided above & below the temperature set point, where the controller will not take corrective action. Example: A setting of 10 for the deadband will result in a deadband that is 5 degrees above and below the temperature setpoint. Active ONLY when the ITC is in Auto Mode & under PID Control The Proportional Band (P), the Integral (I) & Derivative (D) are modes of control that work in union to bring the process variable to setpoint as smoothly and quickly as possible. The P, I & D will be automatically established during the Autotune procedure (see above). Additionally, the P, I & D may all be manually established by the user. Great care should be taken when manually establishing the P, I & D. Proportional Band: The temperature range above and below the temperature set point. Will only be available while the Mode of Operation is set to AUTO. Options are On or Off. Only available while the Mode of Operation is set to AUTO & under PID Control The Manual Offset may be used in conjunction with the PID variables to assist in Tuning the controller. Typically, heat trace applications will not require any Manual Offset adjustment. Manual Offset allows the user to preprogram the approximate power output (%) requirement at the setpoint. This has been proven to reduce the time needed to align the process temperature with the setpoint temperature. As a rule of thumb, relatively light heating loads will require smaller Manual Offset values. The Manual Offset is a percentage output with a range of 0 (0%) to 1000 (100%) and a default of 500 (50%). 13

The Soft Start Function The Soft Start function is located within the Control Menu page. The Soft Start function will operate independently on each circuit. To limit inrush current on the overall system, an inherent characteristic of self-regulating/limiting heating cable, a proprietary Soft Start algorithm is applied during system start-up. This will ONLY occur while the mode of operation is set to AUTO and Soft Start feature is turned ON. The Soft Start program will increment output by 1% every 1 second until the desired temperature is reached or the output % achieves 100%. After the Soft Start program completes its cycle, the Automatic Control Mode of the system will return to either PID or ON/OFF control, depending on what was selected by the user. The Soft Start Program will not function if the control mode is set to Manual. The Comms Menu (Communications) Security Level 3 The Comms Menu provides access to the settings for Serial Communications, Modbus RTU/RS-485 or the optional TCP/Ethernet Communications. These communications settings include: Baud Rate, Parity, Modbus ID, IP Address and DHCP. Modbus RTU requires that you know or define baud rate, character format (Parity), and slave ID (aka slave address, unit number, unit ID). A mismatch in any of these will result in no communication. Likewise, an incorrect IP address will result in no communication on an IP Network. Note: See Modbus Communications Addendum for detailed register addresses and other Modbus settings. 14

6. Comms Menu Baud Rate Parity ModBus ID IP Address DHCP Data transmission speed in Serial Communications, in Hertz (Hz). The range offered by the ITC is 2.4k, 4.8k, 9.6k, 19.2k, 38.4k, 56.0k The parity bit is to be set to NONE, EVEN or ODD. This is the Identification or Address of the ITC Unit on a Modbus Network. The ID shall be any number from 1 to 255. The Internet Protocol (IP) Address is the address or identifier of a device on a network, such as Modbus TCP/Ethernet, which employs the internet protocol to communicate. Assignment of the IP address may be accomplished in one of two ways: 1. Automatically assign (Default). (The DHCP Selection must be USE ) The IP address will be automatically established via the customer s DHCP. 2. Manually assign. (The DHCP Selection must be DO NOT USE ) Select DO NOT USE when in the DHCP menu, then enter the appropriate IP Address via the UP/DOWN arrow keys & ENTER button to accept. NOTE: One MUST cycle power to the unit AFTER changing the status of the DHCP (USE DO NOT USE) and prior to obtaining a new IP Address. DHCP (Dynamic Host Configuration Protocol) Status: Use or Do Not Use. This impacts whether the IP Address is to be automatically assigned by the host DHCP Server or manually entered by the operator. See IP Address above. USE Select USE if you desire to have the IP Address automatically assigned to the unit by the resident DHCP. DO NOT USE Select DO NOT USE if you desire to manually assign an IP Address to the ITC unit. NOTE: One MUST cycle power to the unit AFTER changing the status of the DHCP (USE DO NOT USE) and prior to obtaining a new IP Address. Manually Assign IP Address (Static IP Address) The factory default of the ITC is to have the IP Address assigned automatically by the host DHCP Server. However, one may wish to manually assign or establish a Static IP Address. Follow these instructions below to accomplish this: 1. To manually assign the IP address (if not using DHCP server), navigate to the COMMS menu by logging in and then pressing the MODE key until the COMMS menus is observed. 2. Use the DOWN or UP keys to navigate down to DHCP within the COMMS menu, and then press ENTER. 3. Use the DOWN or UP keys to toggle the selection between USE and DO NOT USE. Make sure that DO NOT USE is displayed, then press ENTER to confirm selection. NOTE: After pressing ENTER, power to the controller must be cycled for the change in the DHCP setting to take effect. 15

4. Use the DOWN or UP keys to highlight IP AD- DRESS, then press ENTER key to edit the IP Address: a. The IP ADDRESS is composed of four fields, each with a value range from 0 to 255. b. Use the UP and DOWN keys to adjust a field value. c. Use the RESET key to toggle between any of the four fields being edited. d. To complete and establish a new IP Address, press the ENTER key to return to the COMMS MENU. Automatically Assign IP Address As previously mentioned, the factory default of the ITC is to have the IP Address assigned automatically by the host DHCP Server. However, if the IP Address was obtained manually and now the desire is to have it established automatically from a DHCP server, the following steps must be taken: 1. Navigate to DHCP within the COMMS menu, and then press ENTER. 2. Use the DOWN or UP keys to toggle the selection between USE and DO NOT USE. Make sure that USE is displayed and then press ENTER to confirm selection. NOTE: After pressing ENTER, power to the controller must be cycled for the change in the DHCP setting to take effect. 16

The Systems Menu Security Level 3 The System Menu provides access to system information and system settings for the ITC. Items contained in the System Menu include: Firmware Version of the ITC, Button Sound for Keypad interaction, Units (Temperature), Temperature Sensing Type, Failed Sensor Output, (Security) Password for Levels 1, 2 & 3, Alarm State (normally open or normally closed) Restore to Default (Settings & Parameters). 7. SYSTEM MENU PAGE 1/2 FIRMWARE VERSION BUTTON SOUND UNITS TEMP. SENSING 1 TEMP. SENSING 2 FAILED SENSOR OUTPUT 1 FAILED SENSOR OUTPUT 2 7. SYSTEM MENU PAGE 2/2 PASSWORD LEVEL 1 PASSWORD LEVEL 2 PASSWORD LEVEL 3 ALARM STATE RESTORE TO DEFAULT CKT 1 AUTO 0% CKT 2 AUTO 0% CKT 1 AUTO 0% CKT 2 AUTO 0% 7. System Menu Firmware Version Button Sound Units Temp Sensing 1 Identifies the Firmware Release of your ITC. The Button Sound may be kept ON or turned OFF Temperature Units, Fahrenheit or Celsius The ITC accepts up to two RTD inputs per channel. In Auto Control Mode, the output of each circuit will function according to the Temp Sensing Setting. However, when in Manual Mode, the Output will only consider the Output % as selected by the User. The following settings and their respective function are available when in AUTO Mode: Single Output is based on the sensed temperature of only one RTD sensor. The 2nd RTD Sensor is not recognized. Average Output is based on the average sensed temperature of the two RTD Sensors. If Average is selected and only one sensor is employed, the unit will sense an open sensor. See Failed Sensor Operation below. Low Output is based on the lowest sensed temperature of the two RTD Sensors. If Low is selected and only one sensor is employed, the unit will sense an open sensor. See Failed Sensor Operation below. High Output is based on the highest sensed temperature of the two RTD Sensors. If High is selected and only one sensor is employed, the unit will sense an open sensor. See Failed Sensor Operation. 17

Temp Sensing 2 Failed Sensor Output Passwords 1, 2 & 3 Alarm State Restore to Default The ITC accepts up to two RTD inputs per channel. In Auto Control Mode, the output of each circuit will function according to the Temp Sensing Setting. However, when in Manual Mode, the Output will only consider the Output % as selected by the User. The following settings and their respective function are available when in AUTO Mode: Single Output is based on the sensed temperature of only one RTD sensor. The 2nd RTD Sensor is not recognized. Average Output is based on the average sensed temperature of the two RTD Sensors. If Average is selected and only one sensor is employed, the unit will sense an open sensor. See Failed Sensor Operation below. Low Output is based on the lowest sensed temperature of the two RTD Sensors. If Low is selected and only one sensor is employed, the unit will sense an open sensor. See Failed Sensor Operation below. High Output is based on the highest sensed temperature of the two RTD Sensors. If High is selected and only one sensor is employed, the unit will sense an open sensor. See Failed Sensor Operation. Use RTD 1 to control both circuits - The output of circuits 1 & 2 will be governed by the RTD1 Input sensor which is located on the Circuit 1 main ITC board. Notes: a. This option is only available on 2 circuit ITC s b. The RTD sensor must be connected to RTD1 Input on Circuit 1 Main ITC Board. See customer wiring section. **IMPORTANT CONSIDERATIONS** The ITC assumes a failed sensor condition if the realized temperature is either below -100 F or above 1500 F. A failed RTD sensor (shorted or open) will send a faulty sensed temperature to the controller that exceeds these thresholds. Therefore, the user must understand the output of the ITC when a sensor fails. Failed Sensor Operation 1. Single In Failed (Open or Shorted) RTD condition, the ITC will switch to Manual Mode. Output will be per specified % by user. Failed Sensor condition will be flashing on the LCD screen and alarm LED will illuminate. 2. Average (when using two RTDs per circuit) a. Individual Failed RTD (Open or Shorted) ITC Unit will operate in Auto Mode with a Single Sensor. The temperature reading from the failed RTD sensor will be ignored. Failed Sensor condition will be flashing on the LCD screen and alarm LED will illuminate. b. When both sensors fail, the ITC will switch to Manual Mode. Output will be per specified % by user. Failed Sensor condition will be flashing on the LCD screen and alarm LED will illuminate. 3. Low Same as Average above. 4. High Same as Average above. When using a single RTD - The ITC will automatically switch into Manual Output Mode when a Failed Sensor Condition is realized. The output % range is 0% to 100% in 1% increments. When using two RTDs, see Failed Sensor Operation above. Default Security Level Passwords may be changed by the user within the System Menu. See Security Levels above for more detail. Select normal state of alarm. Choices include Normally Closed (default) or Normally Open. This operation allows the user to clear all custom settings and parameters and restore the ITC to its original factory state. 18

Current Sampling All active loops are individually tested for 2 seconds every 2 minutes. During the test, a current load value is updated on the yellow bar located on the Main Window and a new GFEP current is automatically and continuously calculated. The Yellow Load LEDs will be illuminated during the sampling test. Alarms Any alarm condition will be displayed in the bottom right corner of the Main Screen. Additionally, a red LED will be illuminated on the front panel under ALARM. The table below illustrates the different types of alarm where # represents circuit number and X represents either sensor A or B Alarm Type Display Solution Open Sensor Shorted Sensor SENS #X ERROR SENS #X ERROR Check if your RTD is correctly connected to the unit or damaged. Alarm clears automatically. Output will switch to Default Mode. Replace RTD if necessary. Check if your RTD is correctly connected to the unit or damaged. Alarm clears automatically. Output will switch to Default Mode. Replace RTD if necessary. Low Temperature LO TEMP CKT #! High Temperature HI TEMP CKT #! High Load HI LOAD CKT #! Low Load LO LOAD CKT #! High GFEP HI GFEP CKT #! Sensed temperature is below Lo Temp Alarm Setpoint. Alarm will be cleared automatically when the sensed temperature is greater than the Low Temperature Alarm Setpoint, + 5 deg Sensed temperature is above High Temp Alarm Setpoint. Alarm will be cleared automatically when the sensed temperature is less than the High Temperature Alarm Setpoint, - 5 deg Sensed load current is above Hi Current Alarm Setpoint. Alarm will be cleared automatically when the sensed current < Current Hi Setpoint 0.5 Amp Sensed load current is below Current Lo Setpoint. Alarm will be cleared automatically when the sensed current > Current Hi Setpoint + 0.5 Amp Sensed GFEP current is above the GFEP Hi Setpoint. Alarm will be cleared automatically when the sensed current < Current Hi Setpoint - 5 ma 19

Dimensions ITC Controller 316 SS Enclosure Fiberglass Enclosure H W D F B M Inch 11.8 9.9 7.6 0.7 1.8 3.0 cm 30.2 25.1 19.4 1.7 4.4 7.6 Inch 10.3 8.5 8.0 1.2 1.8 3.0 cm 26.2 21.3 19.7 3.2 4.4 7.6 Mounting Brackets W D Heat Sink B M H Heat Sink F Wall Mount Brackets 3.000 (7.62) 8.750/10.625 (22.2/27.0) 8.250/10.188 (21.0/25.9) 10.000/11.813 (25.4/30.0).218 (0.55).390 (0.99).875 (2.2) Dimensions Wall Mount are given Bracket for Dimensions both enclosure are types: in Inches Fiberlgas/316SS Wall Mount Bracket Dimensions are in Inches (cm) 20

Default Settings Below is the ITC parameter settings chart organized by Menu Screen. It includes the default, minimum, maximum and / or the range of settings, where applicable. The chart is for either 1 or 2 circuit units. Screen Menu & Parameter Parameter Defaults, Min., Max. & Range & User Settings 3. Temperature Menu Default Min. Max. Also User Settings Temp Setpoint 1 45 F -80 F 1,100 F Lo Temp Alarm 1 40 F -80 F 1,050 F Off Hi Temp Alarm 1 180 F -80 F 1,150 F Off Temp Setpoint 2 45 F -80 F 1,100 F Lo Temp Alarm 2 40 F -80 F 1,050 F Off Hi Temp Alarm 2 180 F -80 F 1,150 F Off 4. Current Menu Default Min. Max. Also User Settings Low Current Alarm 1 0.1 A 0.1 A 50.0 A Off Hi Current Alarm 1 40.0 A 0.1 A 50.0 A Off GFEP Setpoint 1 30 ma 30 ma 150 ma GFEP Alarm/Trip 1 Alarm Only Alarm Only, Alarm & Trip; Latching & Non Latching Low Current Alarm 2 0.1 A 0.1 A 50.0 A Off Hi Current Alarm 2 40.0 A 0.1 A 50.0 A Off GFEP Setpoint 2 30 ma 30 ma 150 ma GFEP Alarm/Trip 2 Alarm Only Alarm Only, Alarm & Trip; Latching & Non Latching 5. Control Menu Default Min. Max. Also User Settings Auto Control Mode 1 PID On / Off PID Auto / Manual / Off 1 Auto 0 100 Off Deadband 1 10 2 100 Autotune 1 Off Off On Proportional Band 1 20 1 100 Integral 1 500 0 9999 Rate 1 1 0 500 Soft Start 1 On Off On Manual Offset 1 500 0 1000 Auto Control Mode 2 PID On / Off PID Auto / Manual / Off 2 Auto 0 100 Off Deadband 2 10 2 100 Autotune 2 Off Off On Proportional Band 2 20 1 100 Integral 2 500 0 9999 Rate 2 1 0 500 Soft Start 2 On Off On Manual Offset 2 500 0 1000 21

Screen Menu & Parameter Parameter Defaults, Min., Max. & Range & User Settings 6. Comms Menu Default Min. Max. Also User Settings Baud Rate 9.6k 2.4k, 4.8k, 9.6k, 19.2k, 38.4k, 56.0k Parity None Even Odd None ModBus ID 1 1 255 IP Address Optional Feature DHCP Use Use Do Not Use 7. Systems Menu Default Min. Max. Range User Settings Firmware Version Current Firmware Version Button Sound On Off On Units Fahrenheit Fahrenheit Celsius Temperature Sensing 1 Single Single, Average, Low, High Temperature Sensing 2 Single Single, Average, Low, High, Use 1 RTD to control both circuits Failed Sensor Output 1 50% 0% 100% Failed Sensor Output 2 50% 0% 100% Password Level 1 Password Level 2 Password Level 3 Alarm State Normally Closed Password Inputs Normally Open Normally Closed Restore to Default Disabled Up / Down Up / Down 22

Specifications Input Sensor Type Number of Sensor Inputs Sensing Configuration Output Power Switching 3-wire RTD, 100 W PT, 0.00385 W/W/ C, 20 W balanced lead wire 1 or 2 per Circuit Range: Single, Low, High, Average SSR Number of Circuits 1 or 2 Capacity Control Types PID Autotune 40 Amps per Circuit (Breaker size shall be 50 Amps maximum per circuit or 125% of anticipated load) Control mode must be set to Auto On or Off Proportional Band, ( F) Range: 1 100 Integral (sec/repeat) Range: 0 9,999 Rate or Derivative, (seconds) Range: 0 500 Manual Offset 0-1000 (0% - 100%) On/Off Dead band, ( F) Range: 2 100 Control mode must be set to Auto Manual Range: 0 100% Soft Start, Current Clamping Settings Temperature (PV) Low Temperature Alarm High Temperature Alarm Low Current Alarm High Current Alarm GFEP GFEP Alarm Condition Output on Sensor Failure Audible button depress Security Alarm State Display, HMI, Indication Display Human Interface LED Indication Enable or Disable Range: -80 F to +1100 F Range: -62 C to +593 C Range: -80 F to +1050 F, Off Range: -62 C to +566 C, Off Range: -80 F to +1150 F, Off Range: -62 C to +621 C, Off Range: 0.1 A 50.0 A, Off Range: 0.1 A 50.0 A, Off Range: 30mA 150 ma, +/-2.5% of Span or +/- 3mA Alarm Only or Alarm & Trip Mode Range: 0 100%, Bumpless Transfer to Manual Mode Range: On, Off 3 Levels of password protected security Normal Operation: Closed (default), Open 3.5 320 x 240 RGB Full color graphic TFT module 5 Capacitive Touch Input Buttons Power (Green), Load (Amber), Alarm (Red) Per Ckt 23

Alarms Alarm Types Alarm Relays Low & High Temperature, Low & High Current, High GFEP, Sensor Failure 1 x DC Alarm Output, 1.8 Amp, Customer Supplied 0-50 VDC 1 x AC Alarm Output, 1.8 Amp, Customer Supplied 12-240 VAC Alarm Contact State Mode Default Optional Communications ModBus Normal Operation Closed Open Alarm Condition Open Closed Power Off Open Open RTU/RS485 (2 or 4 wire) & RTU/RS422, TCP/Ethernet Baud Rate, Hz 2400, 4800, 9600, 19200, 38400, 56000 Parity Range: Even, Odd, None ModBus ID Range: 1 255 DHCP Ethernet IP Operating & Environmental Temperature Range: Use, Do Not Use Webserver over Ethernet -40 F to 104 F (-40 C to 40 C) Humidity Relative Humidity 0% to 90% Power Supply Protection Enclosure Rating Approvals Temperature Rating 100-277 Vac 50/60Hz IEC IP66 NEMA 4X FG UL/cUL Ordinary and Class I, Division 2, Groups A,B,C,D Hazardous locations (UL file Number: E347725), CE T4 24

Equipment Ratings Voltage Rating:... 100-277 VAC, 50/60 Hz Current Rating:... 40 amps per Circuit Number of Circuits... 1 or 2 Ambient Temperature Rating:...-40 F to +104 F (-40 C to +40 C) Altitude Rating:...Fully rated up to 6,500 Ft (2,000 Meters) VA consumption rating on electronics:... 6.0 VA The electronics are protected by a 0.5 Amp 350 VAC 2AG fuse. Maximum RTD output...1.25 volts, 7 milliamps Pollution Rating... Degree 2 Over Voltage...Category III* * Overvoltage note: Category III is maintained only when a UL Listed VZCA type 2 surge protector is employed between the power source and the ITC unit. The surge protector must be rated at 277 Vac (min) with a maximum surge protection rating of 2500 Vpk. Otherwise the ITC is rated at overvoltage Category II. Field Wiring Considerations Torque values for line/load wiring terminals:... 10-13 in/lbs. (1.1-1.5 N-m) Torque values for RTD 1 & 2 wiring terminals:... 6-8 in/lbs. (.67-.90 N-m) Torque values for shield grounding/alarm wiring terminals:... 3-4 in/lbs. (.33-.45 N-m) Terminal Block Gauge Range: Line & Load...6-18 AWG, Copper Alarm & Sensor...12-24 AWG Power Wire Rating Max Load Min Breaker Size (AWG, 90 C) 40A 50A 8 30A 40A 10 20A 25A 12 15A 20A 14 Modbus Wiring Considerations Environmental influences such as EMI/RFI can compromise the communication signal. Properly designed cables will minimize their influences. RS485 Max Length... 2,500 ft. (800 m) RS485 Wire Specification... T1/E1/DSL compatible Example Vendor... L-Com (www.l-com.com) Vendor Item...TSC9928 25

Customer Wiring Power, Heater, Alarms & Sensors These connections are facilitated via the main ITC Board(s) RTD 2A RTD 2B SENSOR INPUTS RTD 1 INPUT COM + Circuit 2 Main ITC Board COM RTD 2 INPUT + Shield Ground Only Shield Ground Only EARTH HEATER HEATER AC LOW AC HIGH AC INPUT 100-277 VAC Breaker must be rated at 125% of max heater load, but not to exceed 50 Amps Upper board applicable on 2 circuit units only 2-Circuit Ambient Sensing Control: To control both circuits with one RTD, the Sensor MUST be wired to RTD 1A INPUT on Circuit 1 Main ITC Board LOAD Max 40 Amps + RTD Wiring White Red - Com Red RTD 1A RTD 1B SENSOR INPUTS RTD 1 INPUT COM + Circuit 1 Main ITC Board (RBF Type RTD Sensor) COM RTD 2 INPUT + Shield Ground Only Shield Ground Only EARTH HEATER HEATER AC LOW AC HIGH AC INPUT 100-277 VAC Breaker must be rated at 125% of max heater load, but not to exceed 50 Amps + DC ALARM AC ALARM LOAD ALARM OUTPUTS DC 0-42 VDC Customer Supplied LOAD AC 12-240 VAC Customer Supplied LOAD Max 40 Amps 26

Communications These connections are facilitated via the Display Board. Modbus TCP/Ethernet or Web Server/Ethernet (when ordered) uses the RJ45 connector Display Board Modbus RTU/RS485 or /RS422 use the Green Terminal Blocks (Detail Below) RX+ RX- N/A RS485 2-Wire Must Jumper (RX+/TX+) & (RX-/TX-) RS485 2 Wire RS422 4-Wire Use RX+, RX-, TX+ & TX- RS422 4 Wire TX+ TX- N/A The lowest pin on the Green terminal blocks has no use All other Display Board connectors are for factory use ONLY. Connection to these may damage the ITC Unit 27

Modbus Addendum Modbus Serial Communications The ITC supports Modbus serial communications. For a complete description of the Modbus protocol refer to the description provided at http://www.modicon.com/ or http://www.modbus.org/ Physical Layer The Base address, bit rate and character format are configured via menu interface. Physical layer configuration settings possible are: Data rate: 2400, 4800, 9600 (default), 19200, 38400, 56000 bps Parity: None (default), Even, Odd Character format: Always 8 bits per character. The transmitter must not start transmission until 3 character times have elapsed since reception of the last character in a message, and must release the transmission line within 3 character times of the last character in a message. Note: Three character times = 1.5ms at 19200, 3ms at 9600, 6ms at 4800, 12ms at 2400 Link Layer A Query (or command) is transmitted from the Modbus Master to the Modbus Slave. The slave instrument assembles the reply to the master. All of the instruments covered by this manual are slave devices, and cannot act as a Modbus Master. MODBUS MASTER QUERY SLAVE INSTRUMENT A message for either a QUERY or RESPONSE is made up of an inter-message gap followed by a sequence of data characters. The inter-message gap is at least 3.5 data character times. Data is encoded for each character as binary data, transmitted LSB first. For a QUERY the address field contains the address of the slave destination. The slave address is given together with the Function and Data fields by the Application layer. The CRC is generated from the given address, function and data characters. For a RESPONSE the address field contains the address of the responding slave. The Function and Data fields are generated by the slave application. The CRC is generated from the address, function and data characters. The standard MODBUS RTU CRC-16 calculation employing the polynomial 2 16 +2 15 +2 2 +1 is used. Intermessage gap Address 1 char. Device Addressing Function 1 char. Data n char. CRC Check 2 char. The instrument is assigned a unique device address by the user in the range 1 (default) to 255. To change Modbus address, navigate to page 6 of the ITC Menu page and select MODBUS ID parameter. Use Up and Down keys to change the value. This address is used to recognize Modbus Queries intended for this instrument. The instrument does not respond to Modbus Queries that do not match the address that has been assigned to it. The instrument will also accept global Queries using device address 0 no matter what device address is assigned. No responses are returned for globally addressed Queries. RESPONSE Figure 1. Modbus Link Layer 28

Description of Modbus Register Set Modbus defines several function types; these instruments support the following types: Table 1 - Modbus Function Code Set Function Code Function Name 03 Read Holding Registers 04 Read Input Registers 06 Write Single Holding Register 16 Write Multiple Holding Registers Input Registers Table 2 - ITC-FS 1&2 Circuit Input Registers Address Description Comments 30000 Sensed Temperature Ckt 1 Sensed Temperature Circuitl 1 30001 Setpoint Ckt 1 Setpoint Circuit 1 30002 Sensed ground fault current on Ckt 1 Sensed ground fault current on circuit 1 30003 Sensed load on Ckt 1 (expressed as integer number ion tenths of Amp e.g. 154 = 15.4 Amp) Sensed load on circuit 1 (expressed as integer number ion tenths of Amp e.g. 154 = 15.4 Amp) 30004 Control Output Command on Ckt 1 Control Output Command on Circuit 1 30005 Sensed Temperature on Ckt 2 Sensed Temperature on Circuit 2 30006 Setpoint circuit 2 Setpoint circuit 2 30007 Sensed ground fault current on Ckt 2 Sensed ground fault current on circuit 2 30008 Sensed load on Ckt 2 (expressed as integer number ion tenths of Amp e.g. 154 = 15.4 Amp) Sensed load on circuit 2 (expressed as integer number ion tenths of Amp e.g. 154 = 15.4 Amp) 30009 Control Output Command on Ckt 2 Control Output Command on Circuit 2 30010 Sensed Ambient Temperature Sensed Ambient Temperature 30011 Reserved 30012 Reserved 30013 Reserved 30014 Reserved 30015 Reserved 30016 Reserved 30017 Reserved 30018 Firmware ver CPU 1 30019 Firmware ver CPU 2 29

Holding Registers Table 3 - ITC-FS 1&2 Circuit Holding Registers Address Description Range Comments 40000 Units 0-1 0-F; 1-C 40001 Setpoint Circuit 1-80-1100 Expressed as an integer number 40002 Setpoint Circuit 2-80-1100 Expressed as an integer number 40003 Control Mode for Circuit 1 0-1 0=PID; 1=ON/OFF 40004 Control Mode for Circuit 2 0-1 0=PID; 1=ON/OFF 40005 Deadband 1 0-10 Expressed as an integer number 40006 Deadband 2 0-10 Expressed as an integer number 40007 Commanded Power Ckt 1 0-100 & 101 40008 Commanded Power Ckt 2 0-100 & 101 Expressed as an integer number e.g 50= 50% (101= Circuit in AUTO mode) Expressed as an integer number e.g 50= 50% (101= Circuit in AUTO mode) 40009 Hi Temp Alarm for Ckt 1-80 - 1150 Expressed as an integer number 40010 Hi Temp Alarm for Ckt 2-80 - 1100 Expressed as an integer number 40011 Alarm Register Ckt 1 0 40012 Alarm Register Ckt 2 0 Bit state: 1 -alarm, 0 -no alarm Bit # 1 - Sensor 1A Error Bit #2 - Hi Temp Ckt 1 Alarm Bit #3 - Lo Temp Ckt1 Alarm Bit #4 - GFEP Ckt 1 Alarm Bit #5 - Lo Current Ckt1 Alarm Bit #6 - Hi Current Ckt1 Alarm Bit #7 - Reserved Bit #8 - Sensor 1B Error Bit state: 1 -alarm, 0 -no alarm Bit # 1 - Sensor 2A Error Bit #2 - Hi Temp Ckt 2 Alarm Bit #3 - Lo Temp Ckt2 Alarm Bit #4 - GFEP Ckt 2 Alarm Bit #5 - Lo Current Ckt2 Alarm Bit #6 - Hi Current Ckt2 Alarm Bit #7 - Reserved Bit #8 - Sensor 2B Error 40013 Proportional Band Ckt 1 1-100 Expressed as an integer number 40014 Proportional Band Ckt 2 0-100 Expressed as an integer number 40015 Integral for Ckt 1 0-100 Expressed as an integer number 40016 Integral for Circuit 2 1-100 Expressed as an integer number 40017 Derivative for Ckt 1 0-500 Expressed as an integer number 40018 Derivative for Ckt 2 0-500 Expressed as an integer number 40019 40020 Low Temp Alarm Threshold for Ckt 1 Low Temp Alarm Threshold for Ckt 2 40021 Baudrate 0-4 -80-1150 Expressed as an integer number -80-1150 Expressed as an integer number 0-240 1-480 2-9600 (default) 3-38400 4-56000" 30